**Dear Meep Users, I have a quick question about using meep-mpi on a multicore processor, specifically the new CORE i5 from Intel. MPICH2 recognizes the availability of the multicore processor and initializing the meep-mpi command using (from the apt-get binaries):
mpirun -np 4 /usr/bin/meep-mpi some_structure.mpi successfully starts meep, recognizes the 4 processors and is off calculating. The problem is that the performance is worse with 4 cores than it is with one core. For example, running the holey-wvg-cavity.ctl example takes 27s and 76s with 1 and 4 cores, respectively. Am I doing something wrong in configuring mpirun that causes the performance to suffer? Am I missing some critical idea about MPI/MPICH2 on multicores that can explain the performance degradation? Thank You, Jonathan Hodges Columbia University
_______________________________________________ meep-discuss mailing list meep-discuss@ab-initio.mit.edu http://ab-initio.mit.edu/cgi-bin/mailman/listinfo/meep-discuss
